Under which condition are you allowed to drive in the left lane of the highway?

Driving in the left lane of a highway is primarily designated for passing. This rule helps maintain efficient traffic flow and ensures that quicker-moving vehicles can overtake slower ones without unnecessary obstruction. If you are driving in the left lane, you should be prepared to return to the right lane after you have successfully passed the vehicle in front of you, as the left lane serves that specific purpose.

Other scenarios, such as moving slower than the posted speed limit or during heavy traffic, typically do not justify staying in the left lane. In fact, remaining in that lane while not actively passing can contribute to congestion and frustration among other drivers. Additionally, yielding to pedestrians is generally not a situation that occurs on a highway, where pedestrian traffic is prohibited, and is not relevant to the rules governing lane use.